Apache Traffic Server up to 9.2.12/10.1.1 Chunked Message request smuggling

Summaryinfo

A vulnerability, which was classified as critical, was found in Apache Traffic Server up to 9.2.12/10.1.1. This issue affects some unknown processing of the component Chunked Message Handler. The manipulation results in request smuggling. This vulnerability is known as CVE-2025-65114. It is possible to launch the attack remotely. No exploit is available. You should upgrade the affected component.

Detailsinfo

A vulnerability was found in Apache Traffic Server up to 9.2.12/10.1.1. It has been classified as critical. Affected is some unknown functionality of the component Chunked Message Handler. The manipulation with an unknown input leads to a request smuggling vulnerability. CWE is classifying the issue as CWE-444. The product acts as an intermediary HTTP agent (such as a proxy or firewall) in the data flow between two entities such as a client and server, but it does not interpret malformed HTTP requests or responses in ways that are consistent with how the messages will be processed by those entities that are at the ultimate destination. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

Apache Traffic Server allows request smuggling if chunked messages are malformed.  This issue affects Apache Traffic Server: from 9.0.0 through 9.2.12, from 10.0.0 through 10.1.1. Users are recommended to upgrade to version 9.2.13 or 10.1.2, which fix the issue.

The advisory is available at lists.apache.org. This vulnerability is traded as CVE-2025-65114 since 11/18/2025. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. The technical details are unknown and an exploit is not available. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 07/26/2026).

The vulnerability scanner Nessus provides a plugin with the ID 304874 (Linux Distros Unpatched Vulnerability : CVE-2025-65114), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 9.2.13 or 10.1.2 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (304874). If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Vendor

• Apache

Name

• Traffic Server

Version

• 9.2.0
• 9.2.1
• 9.2.2
• 9.2.3
• 9.2.4
• 9.2.5
• 9.2.6
• 9.2.7
• 9.2.8
• 9.2.9
• 9.2.10
• 9.2.11
• 9.2.12
• 10.1.0
• 10.1.1

License

• open-source

Website

• Vendor: https://www.apache.org/

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If you want to get best quality of vulnerability data, you may have to visit VulDB.

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